:unique-opened="true" 只保留一个菜单
:router="true"开启路由标识
index="users" 是标识 它就会去找这个路由
<el-menu default-active="2" :router="true" :unique-opened="true" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" background-color="#d3dce6" text-color="#fff" active-text-color="#ffd04b" > //标识 <el-menu-item-group> <el-menu-item index="users">用户列表</el-menu-item> <el-menu-item index="1-2">选项2</el-menu-item> </el-menu-item-group> //路由 { path: "/home", name: "home", component: () => import("../components/home/home.vue"), children: [ { path: "/users", name: "users", component: () => import("../components/users/users.vue") } ] }